Traffic pollution kills 5,000 a year in UK, says study

 
Traffic Traffic pollution occurs much nearer to people's homes than industrial emissions, the authors say

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Road pollution is more than twice as deadly as traffic accidents, according to a study of UK air quality.

The analysis appears in Environmental Science and Technology, carried out by Steve Yim and Steven Barrett, pollution experts from MIT in Massachusetts.

They estimate that combustion exhausts across the UK cause nearly 5,000 premature deaths each year.

The pair also estimate that exhaust gases from aeroplanes cause a further 2,000 deaths annually.

By comparison, 2010 saw, 1,850 deaths due to road accidents recorded.

Overall, the study's findings are in line with an earlier report by the government's Committee on the Medical Effects of Air Pollutants (COMEAP), which found that air pollution in 2008 was responsible for about 29,000 deaths in the UK.

The new study arrives at a slightly lower annual figure of 19,000, a difference the lead author of the COMEAP study, Fintan Hurley, attributes to differing methodology.

Breaking down pollution

The latest study adds to the debate by breaking down mortality rates according to sector - transport, energy and industry.

The researchers combine models of atmospheric circulation and chemistry with source data and clinical studies to arrive at their independent figures for the health effects of pollution.

Oil refinery (Getty Images) The findings challenge the traditional view that industrial plants are the main source of pollution

Although the popular perception of air pollution involves images of smoke stacks billowing out toxic black fumes into the atmosphere, industry and the power sector turn out to kill fewer than vehicle emissions, the data shows.

"Cars and lorries emit right by where people live and work and so have a greater impact," explains lead author Steven Barrett.

The findings also pinpoint where the deaths happen: 2,200 every year in Greater London, another 630 in both Greater Manchester and West Midlands.

Because the model includes Europe-wide weather patterns, it also reveals how far the deadly effects of air pollution can reach.

Of the 19,000 annual UK deaths estimated, 7,000 are due to pollutants blown in from the continent. In London, European pollutants add 960 deaths each year to the 2,200 caused by UK combustion fumes.

UK metropolitan area Estimated deaths linked to UK combustion emissions Estimated deaths linked to UK + EU combustion emission

Source: Dr Steven Barrett

Greater London

2,200

3,160

Greater Manchester

630

810

West Midlands

630

820

West Yorkshire

520

700

South Yorkshire

350

480

Yorkshire and Humber

280

390

Merseyside

240

310

But the international trade in deaths goes both ways. More than 3,000 European deaths can be attributed to UK emissions the authors say.

"We are all in this together," agrees Fintan Hurley of COMEAP.

"If one city were to clean up its traffic, it would still be dealing with pollution from traffic elsewhere."

Start Quote

We estimate the premature deaths are costing the UK at least £6 billion a year”

End Quote Dr Steven Barrett Study co-author

The propensity for air pollution to straddle boundaries has political, as well as medical, implications.

The UK is currently facing the threat of prosecution by the European Union for serial violations of air-quality standards.

But the new study suggests that 40% of the key pollutant, PM2.5 (particles up to 2.5 micrometres in diameter) comes from abroad.

"The EU-attributable particulates in London are likely to have significantly contributed to the violations, because they raised the background concentration on which local short-term peaks were superimposed," explains Steven Barrett.

Not that these legal niceties are of any help to those most at danger from polluted air. The analysis identifies key improvements that would help reduce the health burden of air pollution.

Practical measures include the reduction of black carbon emitted in car exhausts - especially from older cars that fail to burn their fuel completely.

Reductions in nitrogen oxide (NOx) emissions would also help, though perhaps at a cost of making vehicles less efficient.

Far more effective, experts say, would be to invest in public transport, taking cars off the road altogether.

Such improvements would come at a cost, but so does continuing with business as usual.

"We estimate the premature deaths are costing the UK at least £6 billion a year," says Steven Barrett, "and perhaps as much as £60 billion."

For comparison, Crossrail is projected to cost £14.8 billion to build and expected to remove 15,000 car journeys during the morning peak.

Meanwhile, Steven Barrett is moving his attention to another form of public transport, and hopes soon to conclude a detailed assessment of the health impacts of either a third runway at Heathrow and of the alternative Thames Estuary Airport proposal.

 

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  • rate this
    -7

    Comment number 141.

    The reality is the car is here to stay. Its form of power may change from petrol/diesel to electric but like it or not people prefer cars to public transport as much for convenience (even if public transport was cheaper). In today's economy where people have to travel great distances for work and to see families the car is the only practical solution. Even for those in live in big cities.

  • rate this
    +9

    Comment number 139.

    I recently stopped smoking and have been regularly tested by my GP for CO levels. Amazingly, the level didn't actually drop when I stopped smoking- that is how polluted the air is in our towns. And I live in Worthing, right on the sea, so I'm spared the worst of it.

  • rate this
    +2

    Comment number 100.

    London has the dirtiest air of any European capital. Our children are the worst victims of this disgraceful situation. Air pollution is heaviest as it
    falls to ground level. The number of child sufferers of asthma and other
    breathing disorders will continue to grow until London has clean air, until only public transport and taxis are allowed on its streets, and
    private cars are banned.

  • rate this
    +29

    Comment number 54.

    An objective solution requires politicians and people to work together. Politcians to have the honour to stop serving the short-term economics and courage to serve the people and long term health. People to break old habits to change. However, we need alternatives - better public transport, more working from home, incentives for clean travel. 4 x 4s in London should be banned completely

  • rate this
    -8

    Comment number 42.

    These sort of statistics are highly misleading and alarmist. Traffic pollution is not sneaking into 5,000 peoples' homes at night and pressing a pillow to their faces, rather it is a contributary factor towards a range of fatal diseases. Perhaps it tips the scales for some people in terms of contracting such a disease, but it is not directly killing people in the manner described.

 

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